FBTF: Remove "obviously" unneeded standard C++ library #includes.

chrome/browser/gtk/options/managed_prefs_banner_gtk.h

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_GTK_OPTIONS_MANAGED_PREFS_BANNER_GTK_H_
 #define CHROME_BROWSER_GTK_OPTIONS_MANAGED_PREFS_BANNER_GTK_H_
 #pragma once
 
-#include <set>
-
 #include <gtk/gtk.h>
 
 #include "chrome/browser/managed_prefs_banner_base.h"
 
 // Constructs and maintains a GTK widget displaying a warning banner. The banner
 // is displayed on the preferences dialog whenever there are options that are
 // not settable by the user due to policy.
 class ManagedPrefsBannerGtk : public ManagedPrefsBannerBase {
  public:
   ManagedPrefsBannerGtk(PrefService* prefs, OptionsPage page);
   virtual ~ManagedPrefsBannerGtk() { }
 
   GtkWidget* banner_widget() { return banner_widget_; }
 
  protected:
   // Update widget visibility.
   virtual void OnUpdateVisibility();
 
  private:
   // Construct the widget.
   void InitWidget();
 
   GtkWidget* banner_widget_;
 
   DISALLOW_COPY_AND_ASSIGN(ManagedPrefsBannerGtk);
 };
 
 #endif  // CHROME_BROWSER_GTK_OPTIONS_MANAGED_PREFS_BANNER_GTK_H_